Eraser



QCQ. 8; I C. C. HARRIS ERASER Filed May 78, 1934 Gar-Z 6%6/2'8.

Patented Oct. 8, 1935 =1 UNITED STATES PATENT OFFICE ERASER Carl 0. Harris, Orange, Mass. Application May 8, 1934, Serial No. 724,529 3 Claims (01. go- -ss) Thisinvention relates to an eraser for use on thin pencils or to a thin eraser adapted for uses similar to those of thin pencils.

The principal objects of the invention are to 5 provide a-propelled eraser in a thin casing which can be placed between the leaves of a book or' carried fiat in a pocket; to provide means whereby, as the eraser wears down, it can be projected outwardly and can be adjusted backwardly so as t'o provide for its efiicient manipulation as an eraser; to provide a casing which will be capable of use with a propelled lead in the other end; to provide magazines for one or more leads at the side of the eraser propelling means; to provide a similar casing in such form that it will carry the eraser without its combination with a pencil holding means, and to provide simple means for preventing the propelling screw from rotating and simple means for connecting the propelling screw in rotational relation to the eraser.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawing, in which Fig. 1 is a plan of a combined pencil and eraser constructed in accordance with this invention;

Fig. 2 is an edge view of the same;

Fig. 3 is a view similar to the eraser part of Fig. 1 on enlarged scale;

Fig. 4 is a similar view of the eraser itself and propelling screw removed from the casing;

Figs. 5, 6 and 7 are transverse sectional views respectively on the lines 55, 66 and 11 of Fig. 3;

Fig. 8 is a perspective View of the end of the eraser and the clip which holds it, and

Fig. 9 is a View similar to Fig. 3 of a modified form of the invention in which the pencil part is eliminated and the article serves only as an eraser.

An eraser for pencil or ink, formed of a thin piece of erasing material with a guard to hold it in position, has several advantages. In the first place the erasing can be controlled to apply to a single line or letter, thereby saving in the rubber as in an ordinary eraser much surface is rubbed without accomplishing anything.

This invention relates to such an eraser and a holder therefor used separately or in connection with a thin or flat pencil. Such an eraser is particularly desirable with a thin pencil and, in fact, is almost indispensible. On account of the thinness of the eraser it is desirable to provide it with a guard and with means for propelling and repelling.

magazines l3 for extra leads.

Referring to the drawing, a long metallic pencil case I is provided having a lead I I at one end adapted to be propelled by means of a nut IZ'and screw and provided with two side cylindrical In the center is 5 a cylidri'cal compartment I 4 for the lead I I, screw 9, and the screw I8 for the'eraser.

In this case the part I5 of the main casing at one end receives the fiat thin eraser I6 and its associated parts. This also involvesa nut I! for 10' operating the eraser l6. Usually less than half the length of the pencil case is taken up with theeraser magazine, the lower part being taken up with the mechanism for propelling the lead.

The magazines i3 for the extra leads are open at the eraser end and are filled and emptied from that end being covered by a member for holding the eraser, as will appear hereinafter.

The arrangement for operating the lead does not in itself constitute a part of this invention and is shown and described in my Patent No. 1,97 5,7 88, granted Oct. 9, 1934, on an application filed April 13, 1933, Serial No. 665,913.

The central cylindrical compartment I4 not only provides space for the lead II and the pro- 5 pelling means therefor but also for the screw I8 cooperating with a nut IT. This nut is located in an opening I9 through the casing of the same cross sectional area as the nut so that the nut can be rotated and cannot move longitudinally 3 and the screw will be propelled in one-way or the other according to the direction of rotation of the nut. The screw I8 is provided With a flattened end 20 operating in a groove 2i! of a corresponding shape and its opposite end is provided with a head 2| separated from screw threads by a neck 22.

The eraser I6 is provided with a sheet metal clip 23 doubled over it and having prongs 24 pressed inwardly to hold the rubber eraser I6 in the clip. The clip also has a T-shaped slot 25 to receive the head 2| and neck 22 so that the screw IB can be attached readily to the clip and thereafter will move it with the screw. The thin eraser It, of course, projects through the metallic casing I5 which serves as a shield toprevent the bending of the rubber except that part which is projected through the end of the casing. This enables the user to make his eraser as stifi or as limber as he may see fit and this by a very simple adjustment of the nut I! so that no one is likely to use an eraser which is in improper condition for use on account of projecting too far or not far enough. This makes it possible to erase a singlev line or letter very readily without wearing off a large area of the eraser to no purpose.

In the first eight figures the invention is shown as applied to a pencil of a fiat type, such as shown in my above mentioned application, where it is particularly useful and almost necessary. In Fig. 9 the elements shown at the end of the pencil in Fig. 1 are provided for and numbered in the same way but the pencil part is omitted so that this is an eraser as an article of manufacture.

In introducing spare leads into the magazine l3 it is necessary to project the clip 23 to the outside and remove it from the screw head 2| because the bottom of this clip constitutes a cover for both magazines. In this position the magazines can be filled or a lead can be taken out for use.

The eraser can be operated by the fingers of. one hand whereas it has been necessary heretofore in'movable erasers to use the fingers of two hands for this purpose. This construction also provides an increased capacity for the eraser. Some features of the invention can be used in round or other forms.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:-

1. As an article of manufacture, an eraser casing having a cylindrical passage therein, ascrew in said passage having a fiat end, said passage having means for receiving the fiat end of the screw to prevent the screw from turning, the casing having an opening entirely through it registering with said passage, a nut in said opening fitting the threads of said screw, whereby the rotation of the nut will move the screw longitudinally in the casing, the. screw having a head thereon, a metal clip for holding a rubber having a lateral slot for receiving said head, said casing having a recess open at the end in which the clip. and rubber can be received, whereby the rubber can be projected from the end of the casing for erasing purposes.

2. In an eraser combination with a thin fiat casing having a thin rectangular compartment opening at the end of the casing and a central compartment beyond the first named compartment, ascrew in the central compartment, a nut on the screw, means on the casing for preventing the nut from moving longitudinally, means for preventing the screw from turning, and readily detachable means on' the screw for connecting it with an eraser in said first compartment.

3. The combination of a thin casing, a nut held thereby from longitudinal motion, a screw passing through the nut and capable of being moved by the nut, said screw having a head on the end and a clip for holding an eraser in the casing, said clip having a slot open at one side for receiving said head so that the screw and clip are detachably connected.

CARLO. HARRIS. 

